Shock absorber



Dec. '1, 1931.

C. DE LU KACSEVICS SHOCK ABSORBER Filed Aug. .30, 1929 I N VEN TOR. CHARMS 0:1 IX 965i was A TTORNE Y.

Patented Dec. 1,1931

"UNITEADFZSTAATES CHARLES be LUKACSEVICS, oF nnmnor'r,

- or DErnoi'r, MICHIGAN MicHIeAN, IASSIGZN'ORVTO LILIAN BYRNE,

' snocx ABSORBER Application filed aug st-jet, 1 929. ,seriai' no. 359,579.

This inventionrelates to shocklabsorbers and the object of the invention is to provide a shock absorber of the friction type in which the friction is adjustable to adjust the shoclr' absorber to the load.

Another object of the invention is toprovide ashock absorber of the'character described having a yieldable arm for connection to the automobile axle and yieldable under -an upward or downward movement of the g 1 frlctlon'face '14 1s provided for the face said axle.

A further'object of the invention is'to provide a shock absorber in which a shock first moves the shock absorber arm and then moves the shock absorber mechanism byimeans' of the arm.

Another object of the invention is to pro;

vide a shock absorber comprising conical frlction faces riding n constant surface con- -tact and provided with an adjustable spring j tensionfor accommodating the shock absorber tothe load. I

A further object ofjthe invention is'to provide. an arm having a yieldable connection with the movable part ofthe'shock absorber mechanism, the said yieldable connection be ingarranged'to increasin'gly'resistmovement j j the nut 20 in position. These springs 17 and 18 force'the member 5 toward the base; R 80 1 tween the conical friction face 6 and the companion friction face 14, and between the fricof the arm as it is moved in relation to the shock absorber proper. v 1

These objects and the several novelffeatures of-the' invention are hereinafter more fully described and 'claimed and the preferred form of constructionby which these objects are attained is shown in the accom- -jpanying drawings in which Fig. 1 is an elevation of a shock absorber embodying my invention, partly broken away to show the construction. I

5 mobile chassis. The base plate lis provided with a hub 3 having a central aperture for the bolt 4. This hub is splined on theexte rior to receive a member 5 which is'movablej' longitudinally of the splined hub. coni 50 cal friction face-Gris secured to the'member' Fig.2 is a sectiontaken on line 22 of 2 the device, comprises siana is waded "with lugs 7 fitting coinpanion recesses in" the member 5 whereby the friction face 6'is secured to the member 5.

Asimilan'friction face 8 is secured to the conical face 9 of the base plate lby the lugs 10 which extend into recesses in the base plate 1.

posite conical faces 12'and 13. A conical 12 and'1a conical friction face 15 is provided by several portions 16 moulded in apertures in the annular member 11; when the friction facesflt and-'l5"-are. moulded thereon. In order toplace a tension on the friction faces a a pair of spring, steel members 17 and 18' are 'positioned'o'ver the upper end of the bolt 4. Each of these membersi's providedmovable of the shoclfabsorber comprises an annular member '11 having opforthe face 13 of the annular member 11. These friction faces 14: and 15 are connected with ia 1 series of springfin'g'ers' fitting in notches 19 j provided therefor in 5 as shown inFig. 1.

The tension of these springs is adjustable 1 by meansflof the nut 20-on thebolt land. a lock nut 21 is provided on the bolt 4 to lock plate 1 thus producing frictional contact be tion face 8 and the companion friction face 15. By this arrangement turning of the a tension of the springs 17 and 18 byineans of the nurse, 1' 3 ,Themember 11 isprovided with'an exten- 22 is provided with a recess forming two t Lm m e sion 22 at one side thereof and this extension pockets or chambers 23 and An arm 25 is provided having a hub 26 in which. a bush 1 ing' 27 is mounted and a bolt 28 is inserted through the'extension 22- and through the ibushing 27. The arm 25'is provided with g a semi circu'lar portion 29 at the 'hub terminating in two radial shoulders 30 and 31' p which form the limits of the pockets or chambers 23 and 24. An elastic member 32 such as rubber or similar material is positioned in each chamber 23 and 24 and these elastic members 32 yieldably resist turning of the arm 25 on the bolt 28 in either direction. As

these elastic members 32 practically fill the a respective members.

chambers 23 and 24 and as these chambers are reduced in area by turning the arm 25 in either direction, the elastic members will increasingly resist turningof said arm until; the arm 25 carries the member ll-wlth 1t against the resistance of the friction faces in the shock absorber. V

It will thus be seen that minor shocks Wlll be absorbedby the resilient action of the arm 25, which is usually connected by a .link

(not here shown) attached at one end to the ball end of the arm 25 and attached at the opposite end to the automobile axle.

In the case of heavier shocks the initial yielding,movementof the arm 25 overcomes the inertia of the movable member 11 and the arm. thus picks up themember 11 thus build ing up] resistance against the shock. It is also to be noted that the action of the shock absorberis the same 111 e1ther direction and by means of the nut' 20 the shock absorber may be adjusted to the 'load on the wheel adjacentto the shock absorber.

In the form of the device shown in Fig. '2

the friction face 6 is formed'of a hardceramic material having a veryhigh coefficient of friction and having lugs 7'iitt1ng in re ce'sses in the member 5 so that this conical ,fricti'on face 18 mterchangeable "WVlhll other 'frictlon faces ofthe same shape. The fr ction face8 is made of the same material and isprovided'with lugs 10 for insertionin companion recesses in the base plate 1 so that this friction face is also interchangeable with "other'fric'tion faces of the same shape. The friction faces 14 and 15 shown in Fig. 2'are of -a tough rubber which" has been vulcanized to a polntwhere it 1s nearly non-elastic and these frictlon faces 14 and 15 are moulded '1 onto the member lland also into the apertures inthe member 11 as shown at 16 in Fig. 2;

These faces when formed of vulcanized rubber are not interchangeabledue to the fact that they are moulded onto the member 11. These faces may also be made of hard ceramic material similar to the faces 6 and 8 in which case they are provided with lugs fitting the apertures in the member 11 canized rubber in which case the faces arenot interchangeable but are moulded onto the From the foregoing description it becomes evident that the device is very simple and efficient in operation, will not easily get out of order, will absorb minor shocks by a light resistance and will absorb heavier shocks by adding to the resistance, and provides a device which accomplishes the objects described.

Having thus fully described my invention,

itsuti-lity and modeofoperation, what l.

claimand desire to secure by Letters Patent of the United States is- 1.1..Inna; shock absorber, a stationary member adapted to be secured to an automobile chassis-and havinga pair of hard ceramic friction faces, a movable member pivotally mounted in said stationary member and-having a'pair of'hard ceramic friction faces ridingin contact with the friction faces of said stationary member, yieldably adjustable means for holding the friction faces in contact, an extension on one side of said movable member, an arm pivotally mounted I in said extension and having a pair of shoulders on opposite sides of its .pivotand elastic means mounted in said extension and yieldably engaging said shoulders to resist turning of thearm on its pivot in either direction, the outer end'of said arm. being adapted for connection to an automobile axle. I

2. Ina shock absorber, a stationary member adapted-to be secured to an automobile chassis andhavinga pair of interchangeable friction'faces, a movable member pivotally mounteclin 'said' stationary member andh'aving a pair ofinterch'angeable fric tion faces riding in contact with the friction faces of said{ stationary member, an ex tensiononone side offsaid'movable member, anarm pivotally mounted in said extension and having a pair of "shoulders ar ranged on opposite sides of its pivot and elastic means mounted in said extension and yieldably engaging said shoulders.

3. In a shock absorber, a stationary member adapted to be secured to an automobile chassis, a movableme'mber pivotally mount-- ed in said stationary member, friction means resisting turning of the movable member in relation to, the stationary member, an extension on one side of themovable member, a pair of recesses formed in said extension, an arm pivotally mounted in said extension, a pair of'di ametrically opposite shoulders on said arm adapted to reduce. the area of either recess by turning of said arm on its pivot and anxelastic member positioned in each recess.

' 4. Ina shock absorber, a-stationary member adapted. to be secured .to an automobile chassis and havinga .pair of friction faces, carried. by said .member, a. .movable member pivotally mounted. insaid' stationary meme. ber andhaving; a pair of friction faces-riding in contact with the friction faces of said stationary member, an extension on one side of said movable member, an arm pivotally mounted in said extension and means engageable by movement of the arm in either direction and yieldably resisting turning of said arm on its pivot in either direction.

5. In a shock absorber, a stationary member havin a air of friction faces a mov-Y b 7 able member pivotally mounted in said stationary member and having a pair of friction faces riding in contact With the friction faces of the stationary member, adjust able means for holding the friction faces in contact, an arm pivotally connected to said movable member and means engageable by movement of the arm in either direction and resisting turning of said movable member on its pivot, manually adjustable means for varying the tension on the friction means,

an arm pivotally connected to said movable member and yieldable means engageable by the arm and resisting turning of said'arm on its pivot in either direction.

8. In a shock absorber, a stationary member, a movable member pivotally mounted in said stationary member, friction means resisting turning of the movable member in relation to the stationary member, an arm pivotally connected to said movable member and yieldable means engageable by the arm and increasingly resisting turning of said arm on its pivot.

In testimony whereof cation.

CHARLES DE LUKACSEVICS.

I sign this specifi- 

